Schorl and Smoky Quartz – NERS 028

Well-formed schorl crystal with smoky quartz crystal

Measurements:  53 x 48 x 46 mm  

Description:  A well-formed schorl crystal with prominent "Mercedes sign" termination and a smoky quartz crystal to one side. 

The specimen has a few contact and pressure marks and nicks, and bits of stubborn, reddish clay. It displays well on a flat surface, at a slight angle.

Weight of Specimen:  151.0 g   

Chemical Composition:  NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                       SiO2  (quartz)    

Hardness on Mohs Scale:  (schorl)  7.5
                                          (quartz)  7

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 028


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